Many of us know "the three phases of the substance". One of the most well-known example given for this is "the water". Water is liquid when it is in normal condition, when it is freezed it goes into solid, when it is heated it goes into gas. Here, this condition change of the substance without losing its molecular structure is the three different phases of the substance. But every substance can not go into this three phases. For example, if you heat gunpowder, you can not reach its gas phase. When it is heated it explodes and become completely a different molecule. Glass can not get solid phase property when it is cooled, it only becomes rigid.

The reason why we suppose that the glass is solid is that it is very rigid. The reason why a thick glass layer on the lower parts of the ancient glass cups and vases is being formed is that the glass continuously flows down in invisible amounts. (Harun Yahya, The Miracle in the Atom)

Why is the glass liquid?

To understand this better, we should think this example. Water has the same molecular properties in gas, liquid and solid phases and it is described as the H2O formula. Molecules which form water slide over each other when it is in liquid phase, molecules spread over a wide area independently from each other when it is in gas phase. But when the water is in ice condition, molecules which form water arrenge in extremely symmetrical and flawless order and they "crystalise". Thus, ice is formed. When the substance is solidified it obtains an unique geometric shape, it is called the “crystalisation” of the substance. When the substance gets cold, if it doesn’t obtain this symmetrical order then this substance is not solid. That’s the reason why the glass can not be accepted as “solid”. When the molecules which form the glass are got cold, they can’t obtain a crystal structure. There is not a regular sequence in the molecules and atoms. A substance which can not obtain a sequence like this can never get crystalised, and therefore can never reach “solid” phase. Anyone who learns how atoms form all of the objects in the universe and think about it with conscience and wisdom will see Allah’s infinite might, mind and unique creation, and will succumb his inability in the face of Allah’s power. Allah informs us in the verses that He dominates everything as below:

“With Him are the keys of the unseen, the treasures that none knoweth but He. He knoweth whatever there is on the earth and in the sea. Not a leaf doth fall but with His knowledge: there is not a grain in the darkness (or depths) of the earth, nor anything fresh or dry (green or withered), but is (inscribed) in a record clear (to those who can read).” (Surah 6. Al-An'am, 59)